Tone generating apparatus

Abstract

A plurality of envelope generating circuits provide output envelope waveforms which are controlled according to the output from a plurality of timbre switches. The envelope waveform of at least one of the envelope generating circuits is modified according to a touch data output of a touch data detecting circuit for detecting a way of operation of a performance key.

What is claimed is: 
     
       1. A tone generating apparatus comprising: means for sequentially outputting a plurality of waveform data constituting one waveform period, each waveform data representing one of the portions of a waveform;   means for setting a plurality of timbre data corresponding to at least one designated timbre;   means coupled to said timbre data setting means for generating a plurality of different envelope waveforms;   means for generating touch data in accordance with a way of operation of performance keys;   means for controlling at least one of said plurality of different envelope waveforms as a function of said touch data; and   means for selectively allotting said envelope waveforms for each of the waveform portions so as to obtain a tone data by adapting an allotted envelope waveform to a waveform data corresponding to the waveform portion.   
     
     
       2. The tone generating apparatus according to claim 1, wherein said envelope waveform generating means includes: a decoder coupled to said timbre data setting means for decoding said timbre data;   means for generating an envelope clock according to the output of said decoder;   means for counting said envelope clock; and   means for comparing the count contents of said counting means and said touch data.   
     
     
       3. The tone generating apparatus according to claim 2, which further comprises: data transforming means coupled to an output terminal of said touch data generating means for transforming said touch data to a plurality of different touch data; and   means for supplying said plurality of different touch data to said envelope waveform generating means for generating a plurality of modified envelope waveform data.   
     
     
       4. A tone generating apparatus comprising: means for sequentially outputting a plurality of waveform data constituting one waveform period, each waveform data representing one of portions of a waveform;   means for generating a plurality of different envelope waveforms;   means for generating touch data in accordance with a way of operation of performance keys;   means for controlling at least one of said plurality of different envelope waveforms as a function of said touch data; and   means for selectively allotting said envelope waveforms for each of the waveform portions so as to obtain a tone data by adapting an allotted envelope waveform to a waveform data corresponding to the waveform portion.